Pass Labs HPA-1
The HPA-1 headphone amplifier was designed ground-up to become what we believe is one of the very best sounding headphone amplifiers available today. With low feedback, wide bandwidth and a direct coupled MOSFET output stage, this musical instrument drives even the most difficult headphone loads with ease, power and grace. The HPA-1 also functions as a line-level preamplifier that sonically rivals much higher-priced competition. The measured performance is superb and the sound even better.
| Gain (dB) | 8 db |
| Frequency Response 10hz – 100k | -1 dB |
| Output Power into 20 ohms | 3500 mW |
| THD + Noise | < 0.005 at 1V out |
| Out Power into 300 ohms | 200 mW |
| Input Impedance | 50K Ohm |
| Output Impedance | < 2 ohms |
| Power Consumption (Watts) | 23 |
| Unit Dimension (W x D x H) (In.) | 11 x 13.5 x 4 |
| Unit Weight (LBS) | 14 |